PMC Alarm: ER17 Program prity

AlfaGTA · Jun 2, 2020

Have a Fanuc 21iT that has the system files corrupted.
Control stuck in "program" screen.
Received system files from Harrison (the builder) including a .LAD file (ladder?)
Cleared the system by power up with "Reset" and "Delete" ...
Cleared the ladder (can no longer view the ladder from the system screen, PMC,PMCLAD)

I can load the file supplied from Harrison (SO35-07 .LAD) via compact memory card.
But it never appears in the PMCLAD.

There is an error on the PMC page :
"PMC Alarm Message: ER 17 Program Parity"

Anyone have any idea what this is and is it causing me trouble reloading my system files?

Thanks in advance.
Ross

Vancbiker · Jun 2, 2020

Pretty sure it means the LAD file is bad on the card.

My PMC-N manual only says "ER17 Ladder Illegal (Ladder is wrong)". While this manual is older than the PMC system used on the 21i series controls, Fanuc usually does a good job keeping things like error messages consistent.

AlfaGTA · Jun 2, 2020

Would i expect the error to disappear if i clear the ladder?
The file seems to load fine from the boot screen, but it never shows on teh control.
Thanks for the response..
Cheers Ross

Vancbiker · Jun 2, 2020

I think the parity error should clear, but you might have another error about there being no ladder. I have overwritten a ladder from a flash card, but never started with a cleared ladder.

I would not expect the ladder to show if, after loading, there is a ladder parity error generated.

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